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2022-04-17 / 4UC 371-079283 / (163) Erigone

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Joan Aragones O+ CCD M200 ES NTP+ 03:47:25 03:48:07.08 03:48:20.09 03:49:02 0.50 0.50 13.01 58.5
2 show Carles Schnabel O+ VID M400 ES GPS++ 03:46:13 03:48:08.12 03:48:17.80 03:49:45 0.16 0.16 9.68 43.6
3 show Gerard Vaudescal O+ CCD M254 FR GPS+ 03:47:52 03:48:48.71 03:49:00.00 03:50:10 0.15 0.15 11.29 50.8
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#150 : 35f05cbe-e8ab-47f9-b99a-6304c24e9a52 [db: observed]

Using prediction 35f05cbe-e8ab-47f9-b99a-6304c24e9a52 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 97 x 56 km
a',b' = 48.3, 27.9 km
X0,Y0 = -2805.0, 14.0 km
Mean diameter = 73 km

From 3 chords (VID,CCD)








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2022-04-17, 03:47 UT (JD = 2459686.658)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1399None16.140 191°, -75° 2.444603e615083.70.0° None2017-05-12 not scaled 2017-05-11
# 1783None16.140 359°, -74° 2.444603e615083.70.0° None2017-05-12 not scaled 2017-05-11
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : 35f05cbe-e8ab-47f9-b99a-6304c24e9a52 [observed]

 Occultation Date + Time   : 2022-04-17 at 03:38:58 UT +/- 0.03 min  [1]
 Object Designation        : (163) Erigone
 Orbit Class               : MBA
 Star Designation          : GDR3 4133169903670285696
 Star Coordinates (ICRF)   : RA = 16 58 14.0057, DE = -15 59 42.933  [2]
 Star Magnitudes           : G = 12.25 mag, RP = 11.29 mag, BP = 13.2 mag
 Object Magnitude          : V = 14.45 mag
 Estimated Magnitude Drop  : 2.3 mag
 Estimated Max. Duration   : 16.1 sec
 Object Mean Diameter      : 73 km  (src: astorb)
 Speed of the shadow       : 4.5 km/s
 Elongation to Moon & Sun  : 43° (sunlit = 100%), Sun = 132°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#150

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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